Enhancement of Free Vortex Filament Method for Aerodynamic Loads on Rotor Blades

A probability method for prediction on High Cycle Fatigue of blades caused by aerodynamic loads

0965-9978/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.advengsoft.2011.07.010 ⇑ Corresponding author. Address: 405 Group, Bei Ha Tel.: +86 10 82313803. E-mail address: [email protected] (D. Zhang). A probability method for prediction on High Cycle Fatigue (HCF) of blades caused by aerodynamic loads (PHBA) is erected and two approaches are adopted: improving the numerical method to obtai...

A Prescribed-Wake Vortex Line Method for Aerodynamic Analysis and Optimization of Multi-Rotor Wind Turbines

This paper extends the prescribed wake vortex lattice/line method (VLM) to perform aerodynamic analysis and optimization of dual-rotor wind turbines (DRWTs). A DRWT turbine consists of a large, primary rotor placed co-axially behind a smaller, secondary rotor. The additional vortex system introduced by the secondary rotor of a DRWT is modeled while taking into account the singularities that occ...

CFD Analysis on Aerodynamic Design Optimization of Wind Turbine Rotor Blades

Wind energy has been shown to be one of the most viable sources of renewable energy. With current technology, the low cost of wind energy is competitive with more conventional sources of energy such as coal. Most blades available for commercial grade wind turbines incorporate a straight span-wise profile and airfoil shaped cross sections. These blades are found to be very efficient at lower win...

Numerical Simulation of Vortex Breakdown by the Vortex-Filament Method

Experimental Study of a Free-vortex Aerodynamic Window

A model of a supersonic free-vortex aerodynamic window has been fabricated and tested. Aerodynamic performance studies show the effectiveness of the model in sealing the simulated laser cavity from higher pressure ambient surroundings. Good starting characteristics and stability of the supersonic window jet are obtained. Static pressure measurements and photographs of the flow fields clearly sh...